Anon's 2 most important things to know about Marxism
Religious: Marxism is derived from a dialectic view of Creatology that imputes to "The One"/"God"/"Geist"/etc an inner 'schism', an inner 'division', an inner 'uneasiness', an inner 'conflict', that 'needed' the creation of the empirical universe to resolve, whereby the path to "wholeness"/"completeness"/"fulfillment"/etc is through a history of necessary evil and necessary good perpetually clashing until at last there occurs an 'inevitable' cataclysmic apocalypse of maximum depravity, pain, and destruction, after which the 'historical process' will have finally 'worked itself out', and humanity will have finally 'reabsorbed' back with "The One"/"God"/"Geist", and all Humanity will rejoice and history will come to an end.
[This is contrasted with orthodox Judaism/Christianity/Islam that holds the event of Creation was an event of God's Love and Benevolence for his creations (humanity). Imagine the difference in how people will socialize and create institutions depending on whether they believed the Creator and everyone and everything in the universe were metaphysically divided as long as the universe exists, or if the universe was entirely created out of love and benevolence for all humanity!]
Economic: Marxism is derived from a false description of the origination of money incomes in human civilization. Marx, following Adam Smith, believed that in the "early and rude state of society", if there ever was such a time, that the very first monetary incomes earned were wages, and that later on with the introduction of people acting in the capacity of "capitalists", there was a reduction in wages and introduction of profits. This is the conceptual framework of Marx's exploitation theory which is what EVERY Marxist institution depends on and takes for granted as true. The reality is that PROFITS were the first monetary income. In the "early and rude state of society" people made products directly from the material world around them, and sold them as commodities. The monetary incomes earned on the sale of commodities is product sales revenues, not wages. Since there were originally no money costs of production, all of the sales revenues were profit. Then, once people became wealthy enough and saved money for investment, instead of using it to consume right away, money began being used to pay people not for their commodities, which requires land and means of production of their own, but for only their labor. This was the onset of wages. Wages represented a monetary cost to DEDUCT from product sales revenues, which used to be all profit, but was now less than 100% by whatever extent wages were paid.
[Imagine if the world knew the reality that the rise of capitalism was in fact the end of the all profit era and beginning of the wage earning class era, that the rise in capitalism brought about a FALL in profit incomes, not the other way around as per Marx!]